Filter plate unit



FIG. 1 is a top perspective view of a filter plate unit, the second and fourth plates are rotated 90° from the orientation of the first, third, and fifth plates;

FIG. 2 is a right side elevational view thereof, the left side, front elevational, and rear elevational views are identical;

FIG. 3 is a top plan view thereof, the bottom is identical, the first filter is shown separately for clarity of illustration, all filter plates in the filter plate unit are identical;

FIG. 4 is a top perspective view of a second embodiment thereof, the filter plate unit differs from the first embodiment in that it shows two filter plates, the second plate is rotated 90°; and,

FIG. 5 is a right side elevational view thereof, the left side, front elevational, and rear elevational views are identical. 

The ornamental design for a filter plate unit, as shown and described. 